Differences in performance with SLI vs dedicated PhysX

jafrankl · Apr 8, 2015

I was looking around and don't know if anyone has tested, but what are the pros and cons of running 2 cards in SLI or leaving them disconnected and dedicating one to PhysX? I would think SLI would give more performance, but not all games support the feature. On average, would SLI or dedicating to PhysX give better performance and why?

davidarad02 · Apr 8, 2015

if you will be running games that use PhysX, then it will be better than using only one card, but the best option is leaving the cards SLI'ed, and leave PhysX to the CPU,

rolli59 · Apr 8, 2015

Two cards in SLI will give performance boost, one of the cards will give more visual effects with very little performance increase.

17seconds · Apr 9, 2015

The performance improvement for two cards in SLI will far outpace the improvement from a single card plus a PhysX card. The performance gains for SLI can be up to ~90%, minus the impact of PhysX. The performance gains for a single card + PhysX can run as high as 25%, but only on GPU accelerated PhysX games. Overall the gain for SLI will be greater in both PhysX and non-PhysX games.

Never set your PhysX to run on the CPU in a system with a primary Nvidia graphics card. Your best option with SLI is simply to select "Auto" in the Nvidia Control Panel PhysX tab.

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Differences in performance with SLI vs dedicated PhysX

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